The word ECG was introduced by Willem Einthoven in 1893. An electrocardiogram or electrocardiography (ECG) is a diagnostic tool that records the electrical activity of the heart. Heart is the organ which pump the blood all over the body. The heart produces small electrical impulses which spread through the heart muscle to make the heart contract. This contraction is helping the heart to pump the blood.
This electrical activity is called conducting system of the heart. Recording this electrical activity is called electrocardiogram. This recording help to find the cause of symptoms such as palpitations or chest pain.
Sometimes it is done as part of routine tests.
Examine the electrical activity of the heart in 12 points of the body. This include 4 limp Leeds and 6 chest leads.
An ECG can show damage to the heart. How fast your heart is beating and the beating in normal rhythm .ECG helps to dhow the effects of drugs or devices used to control the heart (such as a pacemaker) An ECG can show the size and position of your heart chambers.